<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>双飞翼布局</title>
    <style>
*{
    margin:0;padding:0;
}
.left{
    width: 300px;
    height: 500px;
    float:left;
    background:yellow;
    position: relative;
     margin-left:-100%; 
}
.conter{
    width: 100%;
    height: 600px;
    background:orange;
    float:left;
}
.con{
     padding:0 0 0 300px; 
}
  </style>
</head>
<body>
    <!--左边固定  右边自适应  -->
    <div class="main">
        <div class="conter">
            <div class="con">
                111
            </div>
        </div>
        <div class="left">
            
        </div>
    </div>
</body>
</html>